Alarm-clock.



' W. E. PORTER.

ALARM CLOCK.

APPLICATION FILED DEO.18. 1911.

Patented July 30, 1912.

COLUMBIA PLANDGRAPH COU'WASIHNGTON. D c.

UNITED STATES PATENT OFFllQE.

WILSON E. PORTER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR IQ NEW HAVEN CLOCK C0,, OF NEW HAVEN, CONNECTICUT, A CORPORATION.

ALARM-GLQCK.

Specification of Letters Patent.

Patented July 3%, 1912.

Application filed December 18, 1911. Serial No. 666,488.

To all whom it may concern Be it known that 1, WILSON E. PORTER, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in AlarnrClocks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1 a View in front elevation of .an eight-day alarm-clock constructed in accordance with my invention. Fig. 2 a detached view of the clock-move1nent in front eleva' tion showing the parts of the alarm-mechanism in the positions which they have just before the alarm is let off. Fig. 3 a corresponding view, showing the parts in the positions which they have when the alarm is actually being sounded. Fig. i a broken view in vertical section on the line a-b of Fig. 2, showing the parts in the same positions as in Fig. 3. Fig. 5 a broken view in inside elevation of the front movement-plate showing the parts in the positions of Figs. 2 and @L. Fig. 6 a bro-ken view in vertical section, showing the parts in the positions of Fig. 3. Fig. 7 a view corresponding to Fig. 5 but showing the parts in the positions of F 3 and .6. Fig. 8 a detached perspective view of the alarinlever. Fig. 9 a de: tached perspective view of the stop-lever. Fig. 10 a detached view of the alarm-wheel and alarm-cam.

My invention relates to an improvement in that class of eight-day alarm-clocks in which the alarm-train is automatically stopped by the mechanism of the clock after the sounding of the alarm so that the alarmspring will so to speak be conserved and require winding only once in eight days at the time of winding the time-spring, the object being to produce a simple and durable alarm-clock of the character described, with particular reference to fewness of parts and non-liability to derangement in use.

lVith these ends in view my invention consists in certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ an alarm-lever 2 hung upon a plvot 3 projecting forward from the front movement-plate 4L, the said lever being formed at its right hand end with a vertical slot 5 for the reception of a headed p1n 6 by means of which the lever is held against lateral displacement. At about mid way of its length, the upper edge of the lever co-acts with an alarm cone 7 projecting inwardly from the inner face of the alarm-cam wheel 8 with which itis concentrio and which is mounted to turn loosely upon the projecting forward end of the alarm-set arbor 9 which at its rear end projects through the rear movement-plate (not shown) and which is provided at its ex.- treme rear end with a knurled setting-button 10. The said alarm-wheel S is provided upon its forward face with an alarm-cam 11 which has a continuous pitch from its lowest to its highest point so that the work imposed upon the time-movement to operate ,the alarm-cam 11 and its wheel 8 is gradual and constant, whereas the ordinary alarm- .cam with its abrupt rise out of its drop ln poses a heavy burden upon the time- .movement when the alarm-pin is co-acting wit-h this steep portion of the cam, but this steep portion was necessary to permit the alarm to be reset without waiting too long after its being sounded. The said alarmcam 11 co-acts with an alarm-pin 12 mount- ,ed in the projecting forward end of the alarm-set arbor 9 upon the extreme forward end of which is mounted the alarm-set wheel 13 which meshes into an alarm-set pinion 14 having a forwardly projecting sleeve 15 car rying an alarm-set hand 16. The alarm- ,cam wheel 8 meshes into an alarm-cam pinion 17 having a forwardly projecting socket 18 upon which the hour hand 53 is mounted. The said pinion 17 is formed in one piece with a socket 19 upon the rear end of which is staked the hour-wheel 20, the said pinion 17, socket l9, and hour-wheel 2O turning loosely as one piece upon the center-arbor 21 to which is fastened at a point between the wheel 20 and the movement-plate l, a

cannon pinion 22 which is meshed into by a dial-wheel, (not shown) but commonly known as the minute-wheel of the dial work.

At its rlght hand end, the alarm-lever 2 is formed with a depending rounded nose 23 which co-acts withthe upper arm 24: of a stop-lever 25 hung about midway of its y be moved downward with respect to the length upon a stud 2G in the front move intent-plate 4. A flat spring 27 mounted in tl e front n'iovement-plate 4. engages with the lower edge of the arm 24 and exerts a constant effort to lift the same against the nose 23 of the lever 2 and hence to hold the upper edge of the same against the tapering face of the alarm-cone 7. The outer end of the said arm 24 is bent inward to form a finger 28 passing through a clearance-opening 29 near the right hand edge of the front movement-plate 4. The projecting inner end of the finger 28 co-acts with a flexible finger formed by a coiled spring fastened to and depending from the outer end of an alarm-escapement stop-wire 81 the inner end of which is mounted in the forward end of a verge-arbor carrying a verge 83 coacting with the teeth of an ordinary escapement-wheel 34 mounted upon an arbor carrying a pinion 36 driven by the intermediate wheel 3'? on a shaft 38 carrying a pinion 39 meshed into by the main alarm wheel 40 which is provided with three studs 41 carrying a disk 42 upon the forward face of which I mount an alarm-stop pawl 43, the beveled outer end of which projects be yond the edge of the disk, while its inner end extends between two stop-pins 44 and 45, the said pawl turning upon a stud 46 located close to the edge of the disk. A flat spring 47 fastened at one end to the disk 42 co-acts with the inner end of the pawl 43 so as to exert a constant effort to hold the pawl in the position in which it is stopped by the pin 4.5 as shown in F ig. 5. The beveled outer end of the said pawl 43 co-acts with the outer edge of a finger 48 turned inward from the lower arm 49 of the bell-crank lever 25, the said finger 48 passing through a segmental clearance-slot 50 in the move ment-plate 4.

As shown, my improved alarm-clock is mounted in a standard case 51 having a twelve hour dial 52 swept by the alarm-set hand 16, by an hour hand 53 carried by the hour-hand socket 18 and by a minute hand 54 carried by the center arbor or shaft 21.

In the use of my improved alarm clock, it is set for the sounding of the alarm at any predetermined time by means of the knurled setting button 10. Now as the alarm-cam 8 is driven by the time-train of the movement, the alarm-pin 12 will cause the alarmwheel 8 to be gradually pushed from front to rear upon the alarm-set arbor 6 against the tension of a light spring 55 encircling the same. As the wheel 8 moves from front to rear the alarm-cone 7 will be carried with it and operated to slowly depress the alarmlever 2 which will in turn swing the bellcrank lever 25 upon the stud 6 against the tension of the spring 27, whereby the upper arm 24 of the sald stop-lever 25 will i flexible stopfinger 30 of the stop-wire 8 and whereby the finger 48 of the lower arm 49 of the stop-lever 25 will be swung from right to left so as to be disengaged from the beveled outer end of the alarm-stop pawl 48 which up to this time, has blocked the rotation of the main alarm wheel 40. The spring 47 of the pawl 48 now swings the same into its clearance position as shown in Fig. 5, whereby the pawl is entirely cleared from engagement with the finger 48 leaving the spring 21 free to turn the stop-lever 25 from left to right upon the stud 25 so as to lift the finger 28 of the upper arm 24 into its clearance position with reference to the flexible stop-finger 30. The said ting :r 28 having been lifted described, the alarmtrain is left free to run during the time orcupied by one entire revolution of the main alarm wheel. 40. As the said wheel 40 approaches the end of one revolution, the bev eled outer end of the stop-pawl 43 engages with the finger 48 of the lower arm 49 of thebell-crank lever 25. The spring 27 of the lever 25 being stiffer than the spring 47 of the pawl 43, the spring 47 now yields and permits the pawl to turn upon its stud 46 until the upper edge of the pawl is brought into contact with the pin 44 which forms a dead stop for it. l/V hen this takes place the pawl 43 pushes against the finger 48 with the effect of swinging the arm 49 from right to left and of depressing the arm 24, whereby the finger 28 of the arm 24 is moved downward into position to coact with the flexible finger 30 in stopping and holding the alarm train. Ordinarily the end of the flexible finger 80 will engage with the face of the finger 28, but in case the edge of the finger 28 should engage with the side of the finger 30 the yielding of the latter will prevent the stopping of the clock which might otherwise take place in the absence of some other flexible connection between the lever 2 and the cone 7.

I claim 1. In an alarm clock in which the alarmtrain is automatically stopped after the sounding of the alarm, the combination with an alarm-cam wheel, of an alarm-cam and alarm-cone carried thereby, an alarm-lever operated by the said alarm-cam, a twoarmed stop-lever located upon. the outside of the front movement-plate of the clock and having one of its arms arranged to co-act with the said alarnrlever, and an automatic alarm-stop rotated by a member of the alarm-train and co-acting with the other arm of the said alarm-stop lever, for stopping the alarmtrain.

'2. In an alarm clock, the combination with an alarm-cam wheel, of an alarmcam and alarm-cone rotating therewith, an alarm-lever operated by the said alarm-cone,

a twoarmed stop-lever located upon the outside of the front movement-plate of the clock and operated by the said alarm-lever, an alarm-escapement stop co-acting with one arm of the said two-armed stop-lever, and an alarm-stop pawl pivotally mounted upon and rotating with one of the wheels of the alarm-train and co-acting with the other arm of the said two-armed stop-lever for swinging the same into position to stop the alarm-train.

3. In an alarm-clock in which the alarmtrain is automatically stopped after the sounding of the alarm to conserve the alarm spring, the combination with an alarm-cam wheel, of an alarm-cam and an alarm-cone carried thereby, an alarm-lever operated by the said alarmcone, a two armed stoplever operated by the said alarm-lever, an alarm-escapement stop provided with a flexible stop-finger co-aoting with one arm of the said two-armed stop-lever, and an automatic alarm-stop carried by a member of the alarm-train and co-acting with the other arm of the said two-armed stop lever for automatically stopping the alarm.

l. In an alarm clock, the combination with an alarm-wheel, of an alarm-cam and alarm-cone carried thereby, an alarm-lever operated by the said alarm-cone, a twoarmed stop lever located upon the outer face ot the front movement-plate of the clock and having the ends of its arms turned inward, an alarm-escapement stop co-acting with the inwardly turned end of one arm of the said two-armed stop lever, and an automatic stop alarm-pawl co-acting with the inwardly turned end of the other arm of the said two-armed stop-lever and mounted upon a disk revolving with the main alarmwheel of the alarm-movement.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

WILSON E. PORTER. Witnesses Fnnnnnio C. EARLE, CLARA L. WVEED.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

